Formatting only: run code through scripts/format_all.sh

[mhucka]

Some trivial deviations from clang-format in a small number of files seem to have crept in over time. This meant that running the format check scripts in scripts/ could report changes that are not a contributors' actual changes. To prevent possible confusion to developers and maintainers, this commit:

1. adds the results of running ./scripts/format_all.sh
2. adds a .git-blame-ignore-revs file
3. adds intructions to the contributor instructions to run git config blame.ignoreRevsFile on the file

⚠️ Maintainer notice ⚠️: this PR needs to be merged using the "Create a merge commit" strategy. Using "Squash and Merge" or "Rebase and Merge" will change the commit hash and render the entry in .git-blame-ignore-revs ineffective.

[MichaelBroughton]

Thanks for the formatting updates! Happy to merge those, but I don't think we should take on the extra maintenance burden of the the blame-ignore-revs here since it looks like it adds complexity for how we need to merge PRs that isn't worth putting on people anytime we have a formatting change that they want to add to this list. This is a small repo and we need to keep these sorts of things as small as possible.

[MichaelBroughton]

This looks like a neat feature, but it is more maintenance to keep up to date. I'd be inclined to just not bother here.